29743-09-7

Basic information

• Product Name: P-BUTOXYBENZYLIDENE P-BUTYLANILINE
• Synonyms: TIMTEC-BB SBB008215;P-BUTOXYBENZYLIDENE P-BUTYLANILINE;N-[(E)-(4-Butoxyphenyl)methylidene]-4-butylaniline
• CAS NO: 29743-09-7
• Molecular Formula: C₂₁H₂₇NO
• Molecular Weight: 309.45
• Mol File: 29743-09-7.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 443.1 °C at 760 mmHg
• Flash Point: 178.4 °C
• Appearance: /
• Density: 0.95 g/cm³
• Vapor Pressure: 1.24E-07mmHg at 25°C
• Refractive Index: 1.52
• CAS DataBase Reference: P-BUTOXYBENZYLIDENE P-BUTYLANILINE(CAS DataBase Reference)
• NIST Chemistry Reference: P-BUTOXYBENZYLIDENE P-BUTYLANILINE(29743-09-7)
• EPA Substance Registry System: P-BUTOXYBENZYLIDENE P-BUTYLANILINE(29743-09-7)

Safety Data

• Hazardous Substances Data: 29743-09-7(Hazardous Substances Data)

Usage

General Description

P-BUTOXYBENZYLIDENE P-BUTYLANILINE, also known as BBA, is a chemical compound used in the production of liquid crystal materials and photoconductive materials. It is a yellow to brown powder with a molecular formula of C20H23NO and a molecular weight of 293.40 g/mol. BBA is a versatile compound with properties that make it useful in a variety of industrial applications, including as a component in liquid crystal displays, photoreactive coatings, and photoconductive materials. It is known for its ability to exhibit liquid crystalline behavior and is often used as a key component in synthesizing materials with high thermal stability, low molecular organization, and high photoconductivity. However, it is important to handle BBA with caution, as it may cause skin and eye irritation and should be used in a well-ventilated area.

InChI:InChI=1/C21H27NO/c1-3-5-7-18-8-12-20(13-9-18)22-17-19-10-14-21(15-11-19)23-16-6-4-2/h8-15,17H,3-7,16H2,1-2H3/b22-17+

Synthetic route

4-Butylaniline (104-13-2) + p-butoxybenzaldehyde (5736-88-9) → n-(4-n-butyloxybenzylidene)-4'-n-butylaniline (29743-09-7)

Conditions	Yield
With acetic acid In ethanol for 4h; Heating;
In ethanol for 2h; Heating;

Upstream product

• 104-13-2 4-Butylaniline 
• 5736-88-9 p-butoxybenzaldehyde 

Relevant articles and documents

Phase Transitions in N(p-n-Butoxybenzylidene)p-n-Alkyl Anilines: Densitiy and Refractive Index Studies

The density and refractive index variation with temperature in N(p-n-butoxybenzylidene)p-n-alkylanilines viz., 4O.m compounds for m = 4 to 12 are presented.The density, thermal expansion coefficient and the refractive index results infer first order character for IN, AB and CB transitions and a second order character for NA and AC transitions.Pretransitional effects are discussed at IN and AB transitions.The odd-even effect is observed at both the IN and NA phase transitions.The variation of refractive index anisotropy as a function of temperature, in the nematic phase of the compounds in a homologous series has shown an interesting p henomena.The temperature dependence of nematic refractive index anisotropy yields mean field exponent ν = 1 in the vicinity of NA transition.The influence of molecular chemical constitution, the nematic thermal range and the McMillan parameter values on the order of NA transition is discussed in detail.

Organic thermotropic nematic compounds

A new family of organic thermotropic nematic compounds comprising N-(para-substituted alkoxy-benzylidene)-anilines having also a para-n-butyl substituent on the aniline ring. These compounds have the following structural formula: STR1 wherein R is a straight chain alkyl group containing 1 to 4 carbon atoms and R' is n-butyl. Synthesis involves combining the desired p-substituted benzaldehyde and p-n-butyl aniline in equimolar proportions in anhydrous ethyl alcohol with glacial acetic acid as catalyst. The resulting homologous series of compounds are useful as materials which undergo a change in optical properties under the influence of externally applied energy, preferred members of which, either individually or in binary mixtures, have melting points near room temperature, a broad nematic mesomorphic temperature range within an overall range of about 0° to about 70° C., low viscosity in the nematic phase, good stability, and substantially no color.